// $Id: LedsC.nc,v 1.3 2010-06-29 22:07:50 scipio Exp $

/*
 *
 *
 * Copyright (c) 2000-2004 The Regents of the University  of California.  
 * All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
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 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
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 *   documentation and/or other materials provided with the
 *   distribution.
 * - Neither the name of the copyright holders nor the names of
 *   its contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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/**
 * @author Jonathan Hui <jwhui@cs.berkeley.edu>
 */

module LedsC {
  provides interface Leds;
}

implementation {

  enum {
    RED_BIT = 1,
    GREEN_BIT = 2,
    YELLOW_BIT = 4
  };

  command void Leds.set(uint8_t ledsOn) {
    if (ledsOn & GREEN_BIT) 
      TOSH_CLR_GREEN_LED_PIN();
    else
      TOSH_SET_GREEN_LED_PIN();
    if (ledsOn & YELLOW_BIT ) 
      TOSH_CLR_YELLOW_LED_PIN();
    else 
      TOSH_SET_YELLOW_LED_PIN();
    if (ledsOn & RED_BIT) 
      TOSH_CLR_RED_LED_PIN();
    else 
      TOSH_SET_RED_LED_PIN();
  }

  command void Leds.flash(uint8_t a) {
    uint8_t i, j;
    for ( i = 3; i; i-- ) {
      call Leds.set(a);
      for ( j = 4; j; j-- )
	wait(0xffff);
      call Leds.set(0);
      for ( j = 4; j; j-- )
	wait(0xffff);
    }
  }

  command void Leds.glow(uint8_t a, uint8_t b) {
    int i;
    for (i = 1536; i > 0; i -= 4) {
      call Leds.set(a);
      wait(i);
      call Leds.set(b);
      wait(1536-i);
    }
  }

}
